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Data correcting method for high-precision data acquiring system

A data acquisition system, data correction technology, applied in the direction of digital technology network, impedance network, electrical components, etc., to achieve the effect of improving operation speed and excellent real-time performance

Inactive Publication Date: 2013-08-07
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

Acquisition systems with data correction on the market are still relatively rare, especially according to the characteristics of errors and noise in the system, it is still blank to adopt a comprehensive composite correction strategy to process the collected data

Method used

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  • Data correcting method for high-precision data acquiring system
  • Data correcting method for high-precision data acquiring system
  • Data correcting method for high-precision data acquiring system

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Embodiment Construction

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Such as figure 1 As shown, a flow chart of a data correction method for a high-precision data acquisition system of the present invention is realized. The correction method is composed of system error correction and data denoising filtering, wherein the system error correction includes zero point error and gain error correction, The data denoising filter includes the first-stage filtering composed of supervalue filtering and recursive average filtering, and the second-stage filtering completed by the weighted average wavelet threshold denoising method.

[0027] The data obtained after the signal passes through the data acquisition system is first corrected for zero-point error. The specific implementation method is to subtract the actual measured voltage value when the input is short-circuited from the current voltage value.

[0028] ...

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Abstract

The invention discloses a data correcting method for high-precision data acquiring system. The data correcting method includes system error correcting and data denoising filtering. Data sampled by the system are firstly subjected to zero error correction and zero error and gain error correction by a gain error correcting and compensating system and are subjected to denoising filtering by two-stage filtering scheme. Noise easier to remove in the data can be subjected to primary filtering through the first-stage overbalance filtering and recurrence average filtering algorithm, and noise hard to remove can be filtered through secondary improved weighted average wavelet threshold value denoising method. According to characteristics of error and noise in the system, composite processing mode of error correction and two-stage denoising filtering is adopted. Not only can cane system error be reduced greatly, but noise is almost completely suppressed. Signal noise ratio is increased, some details of signals are highlighted and subsequent work is facilitated.

Description

technical field [0001] The invention relates to a data correction method, in particular to a data correction method used in a high-precision data collection system, and belongs to the field of data collection. Background technique [0002] With the rapid development of computer science and technology, digital technology is more and more widely used in scientific research, industrial production and various aspects of human daily life due to its convenience, flexibility, stability and reliability. As an essential part of digital technology, data acquisition technology has also been deeply researched and developed. People usually convert the analog signal sent by the sensor into a digital signal according to the sampling theorem, and then process these digital signals. Data acquisition can be said to be the core of digital signal processing, and the quality of data acquisition will directly affect future work. Data acquisition is widely used in various fields, and has penetra...

Claims

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Application Information

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IPC IPC(8): H03H17/00
Inventor 钟玲娜唐小萍胡松严伟胡博
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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